Mawson drove the ex-Todd Hazelwood #14 Holden ZB Commodore last week at Winton Motor Raceway, marking the first time he'd set foot in a contemporary Supercar.
The Sydneysider was joined by Supercars full-timer Macauley Jones at the evaluation day, who Mawson grew up racing with in karts.
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On the whole, it was an encouraging first taste of what the future might hold.
“It went really well,” said Mawson, speaking with Speedcafe.com.
“I was actually really surprised with the Supercar. A lot of drivers have told me not to expect too much from them.
“They're big and heavy, but everything about them was a lot better than what I anticipated; the power, the grip, how the car handled, so I actually really enjoyed myself.
“I, of course, was driving with the manual gear shift, and I really enjoyed that aspect a lot more, changing gears with a stick than driving with a paddle shift.
“I was left foot braking. I've grown up my whole career left foot braking, so for me, it's very unnatural to brake with the right foot.”
To date, the 25-year-old has largely focused his racing ambitions on Europe.
Mawson won the Formula 4 title in Germany in 2016 before moving into Formula 3 competition and then Porsche Supercup.
This year he focused his attention on a domestic campaign, winning the inaugural S5000 Australian Drivers' Championship with Team BRM.
It's all part of a long-term ambition to race in Supercars, the test marking the next step towards that goal.
“Obviously to make a career in Australia you have to be in Supercars,” said Mawson.
“This is the first step and taste of heading in that direction. Basically, my plans are to do S5000, a second season of it, for 2022, then beyond that to move into Supercars, whether that be Super3 or Super2.”
“They've come from a pretty similar background to myself,” said Mawson.
“I guess I've been in single-seaters for a bit longer than them, but they've proven that you can transition. Obviously, that's what I'm hoping to do.
“That was one of the goals of the test, to see how I transitioned and would adapt to the Supercar. I was pretty surprised with how I adapted.”